My colleague had a frightening experience in the office. She was sick, we asked her to lie down on the sofa in my boss room. My boss wasn't in that day. She went there to sleep. Suddenly she ran out. She said someone pushed her from the sofa to the floor. We were shocked, no one went into the room. After that incident, she do not dare to even sit on that sofa. (Memory collected at the Cheng San Public Library during the "irememberGhost stories" campaign from 27 Sep to 30 Nov 2012)